Electronic Telegram No. 1574
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html
NSV 5285
G. Duszanowicz, Akersberga, Sweden, reports his discovery of a
variable star of red magnitude 14.9 in Ursa Major (and located 159" west
and 106" north of the center of the galaxy UGC 6628) on unfiltered CCD
images (limiting mag 18.2) taken on Nov. 16.125, 18.018, and 19.018 UT
with a 32-cm reflector. The variable object is located at R.A. =
11h39m50s.55, Decl. = +45d58'18".8 (equinox 2000.0); nothing is visible
at this position on previous images taken by Duszanowicz (limiting
magnitude ranging from 18.7 on 2007 Mar. 13.901 to 16.5 on 2008 Apr. 11,
with poor sky conditions on the final date), though a star of red mag
19.3 (USNO-A2.0 catalogue 1350-07983055) is visible at this possition.
An image of the variable has been posted by Duszanowicz at website URL
http://moonbase.be/html/gallery/sncand/PGC36188-S001-STACK.jpg; this
shows the variable to be identical with the apparent quasar discovered
at mag 14.5 by J. Huchra at Palomar on 1975 Mar. 15 (and reported by Kowal
et al. 1976, PASP 88, 521; photographs in Figure 3); the object faded
quickly to mag 20 by 1975 Apr. 1. This object was then designated NSV
5285 in the General Catalogue of Variable Stars, apparently because
spectroscopic observations of the outburst were lacking in 1975.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2008 CBAT
2008 November 20 (CBET 1574) Daniel W. E. Green